Metal-door construction.



F. E. NELSN.

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@W1 my FRANK E. NELSON,IOF JAMESTOWN, NEV YORK.

METAL-DOOR CONSTRUCTION.

Specification of Letters Patent.

Patented May 30, 19M.

Application filed ebruary 15, 1910. Serial No. 544,107.

To all whom it may concern:P

Be it known that I, FRANK lE. NELSON, citizen of the United States, residing at Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Metal- Door Constructions, of which the following is a specification.

This invention relates to tire proof doors and has for its object the provision of a metallic door, the construction of which is such that the several parts thereof may be quickly assembled and etiectually locked against accidental separation without the employment of screws, rivets and similar fastening devices.

A further object is to provide a metallic door including front and rear sections connected by top and bottoni sections and provided with a central depressed panel having means for engagement with the front and rear sections of the door.

A still further object oi the invention is generally to improve this class ot devices so as to increase their utility, dmrability and ctliciency, as Well as to reduce the cost ot manufacture.

Further objects and advantages will appear in the following description, it being understood that various changes in forni, proportions and minor details ot construction may be resorted to within the scope of the appended'elaim.

For a full understanding ot' the invention and the merits thereoiE and also to acquire a knowledge ot' the details ot' construction and the means for etlerting the result, ret

erence is to be had to the Vfollowing description and accotnjnlnying drawings` in which:

Figure l is a plan View oi a metallicdoor constructed in accordance with my invention; Fig. 2 is a vertical sectional view of the same taken on the line 2-2 of Fig. l; Fig. 3 is a transverse sectional view taken on the line 3 3 ot' Fig. l; Fig. 4 is a plan view illustrating a moditied form et the invention; Fig. 5 is a vertical sectional view taken on the line .Vi-5 of Fig. tg Fig. 6 is a transverse sectional view taken on the lil-n` (i4-'ti 'of Fig. 4:. 'i

Corresponding and like parts are retorted to in the lfollowing description and indicated in all the views of the drawings by the sann reference characters. y'

The improved door forming the subject matter of the present invention is preferably constructed of sheet metal and comprises a front section 5 substantially rectangular in shape, as shown, and having its opposite ends bent laterally to produce vertically disposed end walls or stiles -(3, the metal .torming the longitudinal edges ot the end walls or stiles'being ott'set at 7 and bent to produce hooked terminals or flanges S. The metz'd constituting the longitudinal edges ot the rear section 9 is bent to produce sin'aiar 'tianges 10 which engage the flanges o and form an interlocking lap joint, as shown, thus to permit the union of the front and rear sections of the door without the exrployment of screws, rivets and similar fastening devices.

The central portions of the front and rear sections of the door are cut-away to produce transversely alined openings, the metal forming the walls of the. openings being bent rearwardly to produce hooked terminals or tianges 11 for engagement with corresponding tianges on the adjacent Centex` plates or panels 12. The intermediate portions o'l the plates or panels 12 are disposed in parallel relation, while the opposite vertical edges thereof are inclined laterally to produce diverging wings 13 having terminal fanges 14 for engagement with the adjacent flanges 11 o n the front and rear door sections, the `flanges 11 and 14 forming an interlocking lap joint, similar to the lap joint employed for connecting the front and rear door sections, above described.

The metal forming the upper and lower edges of the central plates or panels 1Q is bent upon itself to produce flanges 15 for engagement with corresponding flanges 16 carried by the adjacent ends ot removable inclined plates or wings 17, the opposite `ends ot' tho plates 17 having an interlocking coruna-tion with the anges 11 of the front and rear wall sections, as indicated at 18.

interposed between the front and rear sections ot the door are top and bottom plates 19 and 20 having oppositely disposed tlaugcs` 21, which latter interlock with similar flanges formed on the ipturned por tions ot' :aid front and rear sections, thus to maintain the t'ront and rear sections in the prope spaced relation, while at the saine time forming a rigid connection between the parts.

it will here be noted that the top/.and botllt) i tom sections 19 and '20 are provided with and rear sections, while at the same time permitting the exposed faces of the top-and bottom sections to lie flush with the ends ofl the door and thus present a smooth, unobstructed surface. It will alsobe noted that .the interlocking `lap joints connecting the several sections comprising the door, are arranged. within the hollow body portion of said door so as not to present any obstructions or projections on the outer face of the door and thus give the same a neat, attractive appearance.

Iny assembling the several sections comprising the door, the panels or plates 12 arev first fastened to the front and rear sections, after which the removable inclined end sections or plates 17 -of the panels are placed imposition with the {ianges of said plates engaging the flanges 1l and 15. The top and'bottom sections 19 and. 20; are then interposed between the front and rear door sections and fastened by means of the lap joint, as shown, thus-producing a strong, rigid door in which the several parts are held against accidental separat-ion without the employment of screws, rivets`and similar fastening devices. f

. In Fig. 4 of the drawings, there is illustrated a modified form of the invention in which the front and rear sections of the door are formedvr with a plurality of transverse panels Q4, the latter being depressed' and provided with terminal flanges 25 which engage corresponding flanges 26 formed on the adjacent edges of the. transverse connecting pieces 27 of the front and rear door sections, as shown.

It will of course be understood that the doors may be made in different sizes and. shapes, and that the panels may have any desired cross sectional formation, without departing from the spirit-of the invention.

Having thus described the invention, what is claimed as new is:

lA metallic door including front and rear sections, one of which is provided with integral vertically disposed end walls having interlockingengagement with the other section, vthere being transversely alined openings formed in the front and rear'door sect-ions, and the metalforming the walls of `said cpenings being bent inwardly be-fv tween the front and rear sections to produce flanges spa-ced from the inner faces of said sections, a panel including spaced plates having two of their edges bent outwardly to produce diverging wings having terminal flanges disposed parallel with each other and `fitting over the adjacent flanges` of thefront and rear door sections and bearingagainstthe inner faces of said sections, and their other edges bent inwardly to produce similar flanges, and diverging wings forming a part of the panel and having their opposite edges provided with flanges for engagementwiththe flanges on the adjacent edges of the panel and flangeson the "front and rear wall sections, respectively. In testimony whereof I aiiix my signature in presence of two witnesses.

FRANK E. NELSON.'

Witnesses:

ALLAN A: THAYER, l AXEL H. ANDnRs'soN. 

